I can't withdraw fromBKYHYO. After the withdrawal application was accepted, the funds disappeared.

I made three separate deposits of $2115, $2317, $8009 from July to the end of August this year. The first time I withdrew $13465 on Sep 7th to my coinbase account. After submitting the application, the customer service told me that it was successful. As a result, my coinbase account has not received any money for a long time. The customer service basically didn't reply to me or just let me wait when I contacted it. I suddenly received an e-mail on Sep 13th, writing that my withdrawal was refunded back to my bKYHYO account. The customer service explained that it was due to bad network signal. Then, I tried to withdraw a part of fund for the second time. I applied to withdraw $3465.38 on Sep 14th, and I still didn't get no money till Sep 30th. When I contacted the customer service, I was asked to wait, and then they didn't reply. There is still $10,000 in my account. I don't dare to operate the cash withdrawal at all, because I'm worried that it will be disappeared again. The person who introduced me to use this platform asked for my identity information and said he would investigate for me, but he also disappeared. I have a record of all the information. If the photos or screenshots provided are not detailed enough, I have more to be provided.